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Finding the Fourth Proportional to 60,931.87, 91,364.31 and 18,800.46

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Solution

The fourth proportional to 60,931.87, 91,364.31 and 18,800.46 is: 28,190.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,931.87 : 91,364.31 = 18,800.46 : x
  2. Step 2: Convert to fraction form
    60,931.87/91,364.31 = 18,800.46/x
  3. Step 3: Cross multiply
    60,931.87x = 91,364.31 × 18,800.46
  4. Step 4: Simplify right side
    60,931.87x = 1,717,691,055.58
  5. Step 5: Solve for x
    x = 1,717,691,055.58/60,931.87
  6. Step 6: Final answer
    x = 28,190.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.